<!DOCTYPE html>
<html>

	<head>
		<meta charset="utf-8" />
		<title>ajax请求本地json文件</title>
		<!--<script type="text/javascript" src="js/ajax.min.js"></script>-->
		<!--<script type="text/javascript" src="js/ajax.js"></script>-->
		<script type="text/javascript" src="js/jquery-1.11.1.min.js"></script>
		<script>
			function loadXMLDoc() {
				var xmlhttp;
				if(window.XMLDocument) {
					xmlhttp = new XMLHttpRequest;
				} else {
					xmlhttp = new ActiveXObject("Microsoft.XMLHTTP")
				}

				xmlhttp.onreadystatechange = function() {
					if(xmlhttp.readyState == 4 && xmlhttp.status == 200) {
						document.getElementById("myDiv").innerHTML = xmlhttp.responseText;
					}
				}

				xmlhttp.open("GET", "aaaaa.txt", true);
				xmlhttp.send();
			}
		</script>

	</head>

	<body>
		<div id="myDiv">
			<h2>使用 AJAX 修改该文本内容</h2></div>
		<button type="button" onclick="loadXMLDoc()">修改内容</button>

	</body>

</html>